我县处于辽宁西部山区,山坡地占总耕地的70%以上。过去几年每年修建梯田数万亩,全是大挖大垫,打乱土层,土壤团粒结构遭到破坏,虽然用掺沙子、多施有机肥等措施进行改良,但恢复地力以至达到增产的目的,一般需要3～5年时间。并且每年都要花很大力量改良土壤。 My county is in the western mountainous area of ​​Liaoning Province, with more than 70% of the total cultivated land on the slopes. Over the past few years, tens of thousands of acres of terraced fields have been built every year. All of them are digging large paddings and disrupting the soil layer. Soil aggregate structure has been destroyed. Although measures such as sand mixing and organic manure are used for improvement, Purpose, generally takes 3 to 5 years. And every year to spend great efforts to improve the soil.